Stoichiometry Time!

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# Stoichiometry Time! - PowerPoint PPT Presentation

Stoichiometry Time!. Let’s get started! P2 Mrs. Basile’s class. The Problem. 21. What mass of is produced when 82.4g of Rb and 11.6g of. The Solution. Which one is balanced?. 4Rb+O2 2Rb2O. 4Rb O2+2Rb2O. *Ding* Correct! . This equation is balanced!. On to the next question….

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### Stoichiometry Time!

Let’s get started!

P2 Mrs. Basile’s class

The Problem
• 21. What mass of

is produced when 82.4g of Rb and 11.6g of

The Solution
• Which one is balanced?

4Rb+O2

2Rb2O

4Rb

O2+2Rb2O

*Ding* Correct! 
• This equation is balanced!

On to the next question…

The Solution Part 2
• What is the correct answer for 82.4g Rb?

9.0gRb2O

21g Rb2O

90.11g

The Solution Part III
• Which is the correct answer of 11.6g of O2?

123.4g Rb2O

135.53g Rb2O

4g O2

*Ding* Correct! 
• 11.6gO2 x

x

x

= 135.53gRb2O

=

=

On to the last part…

The Last Part
• So which element is the limiting reactant, everybody?

Rb

O2

*Ding* Correct 
• Yay! You correctly noticed that 90.11g of Rb2O was smaller than 135.53g of Rb2O. Therefore, Rb is the limiting reactant! Hooray !!!!
*Beep* FAIL! >:(
• Really? We’ve gone this far and you can’t see that 135.53g of Rb2O is larger?

*Beep* NO! >:(
• This is the wrong answer. Think back to what I told you before. Is it balanced?

No!Back!

*Beep* INCORRECT! >:(
• This is the wrong answer! Go back to your notes on the balanced slide, and redo the problem.

Go back!

*Ding* Correct 
• 82.4g Rb x

=

=

= 90.11gRb2O

Good Job! On to next question…

*Beep* WRONG! >:(
• The equation is not balanced

Go back, fool!